Vacuum cleaner



FIG. 1 is a top, front and left side perspective view of a vacuum cleaner showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is right side elevation view thereof;

FIG. 5 is rear elevation view thereof; and,

FIG. 6 is a top plan view thereof.

The broken line showing of portions of the vacuum cleaner is for the purpose of illustrating portions of the vacuum cleaner and forms no part of the claimed design. 

The ornamental design for a vacuum cleaner, as shown and described. 